Patent US4803678A successfully refreshed from Google Patents.
US4803678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc cartridge
Assignee: TDK Corp
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Filing: 1986-12-16
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Granted: 1989-02-07
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Expires: 2006-12-16
Abstract
Abstract A disc cartridge capable of preventing a recording surface section of a disc from being contacted directly by a casing to keep the disc housed in the casing at a safe state. The disc cartridge includes a pair of disc receivers each of which has a receiver body arranged so as to be approachable to the disc and formed into a sideways U-shape so as to define therein a recess for selectively receiving therein a part of a peripheral portion of the disc.
Inventors
- 👤 Kimio Tanaka
- 👤 Haruo Shiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:06
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B23/032; G11B23/0321
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
146 words
A disc cartridge, comprising: a casing comprising an upper cover plate and a lower cover plate joined together to define a space therein; a disc rotatably housed in said space of said casing; a shutter for operating at least one window provided in said casing to allow insertion of a disc driving mechanism therethrough into said disc cartridge; actuator means arranged in said casing and engaged with said shutter to releasably lock said shutter; and a disc receiver arranged in said casing and operatively connected to said actuator means to selectively receive therein a part of a peripheral portion of said disc; said disc receiver being formed at a portion thereof approachable to said disc into a sideways U-shape so as to define therein a recess which selectively receives a part of said peripheral portion of said disc therein due to movement of said actuator means.
Claim 2
Dependent Claim
146 words
A disc cartridge, comprising: a casing comprising an upper cover plate and a lower cover plate joined together to define a space therein; a disc rotatably housed in said space of said casing; a shutter for operating at least one window provided in said casing to allow insertion of a disc driving mechanism therethrough into said disc cartridge; actuator means arranged in said casing and engaged with said shutter to releasably lock said shutter; and a disc receiver arranged in said casing and operatively connected to said actuator means to selectively receive therein a part of a peripheral portion of said disc; said disc receiver being formed at a portion thereof approachable to said disc into a sideways U-shape so as to define therein a recess which selectively receives a part of said peripheral portion of said disc therein due to movement of said actuator means.
Claim 3
Dependent Claim
18 words
A disc cartridge as defined in claim 1, wherein said disc receiver is pivotally arranged in said casing.
Claim 4
Dependent Claim
28 words
A disc cartridge as defined in claim 1, wherein said recess has an elastic member applied to a surface thereof contacting with said peripheral portion of said disc.
Claim 5
Dependent Claim
19 words
A disc cartridge as defined in claim 3, wherein said elastic member is formed of a soft plastic material.
Claim 6
Dependent Claim
25 words
A disc cartridge as defined in claim 4, wherein said soft plastic material is selected from the group consisting of polyethylene, polypropylene and vinyl chloride.
Claim 7
Dependent Claim
16 words
A disc cartridge as defined in claim 3, wherein said elastic member is formed of rubber.
Claim 8
Dependent Claim
16 words
The cartridge of claim 2, comprising a pair of disc receivers pivotally mounted in said casing,
Claim 9
Dependent Claim
128 words
The cartridge of claim 7, wherein said actuating means comprise a pair of actuators slidably arranged in said casing along respective edges thereof, at least one of said actuators comprising means for locking said shutter, each said actuator comprising a projection extending through a slot formed in a respective edge of said casing and a cover formed and positioned to entirely cover said respective slot and prevent contaminants from entering said casing, with one of a respective actuator and disc receiver comprising a groove or a pin seated in said groove, and the other of said respective actuator and disc receiver comprising said pin or said groove which form said operative connection, whereby sliding said respective actuators pivot said respective disc receivers to receive or release said disc.
Claim 10
Dependent Claim
34 words
The cartridge of claim 8, wherein each said disc receiver is pivotally mounted on a pivot pin positioned between said recess portion thereof and an end at which said pin or groove is positioned.
Claim 11
Dependent Claim
20 words
The cartridge of claim 9, wherein said respective actuator comprises said groove and said respective disc receiver comprises said pin.
Claim 12
Dependent Claim
39 words
The cartridge of claim 8, additionally comprising a spring bearing member on each said actuator, two spring holders on said casing, and two springs, each mounted on a respective spring holder and positioned on a respective spring bearing member.
Claim 13
Dependent Claim
27 words
The cartridge of claim 8, wherein an end of said casing between said edges and away from said disc receivers is formed into a substantially sideways V-shape.
Claim 14
Dependent Claim
30 words
The cartridge of claim 8, wherein inner surfaces of said upper and lower plates are each formed with a pair of recesses to positionally correspond to said respective disc receivers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |